Large-diameter round-section interlocking pile connecting system and construction process

Abstract

This invention discloses a large-diameter circular-rectangular interlocking pile connection system and construction process. The system includes circular interlocking piles, rectangular interlocking piles, and T-joints. Circular and rectangular interlocking piles alternate to form circular-rectangular interlocking piles. A slot is milled at the connection point for installing the T-joint. The joint includes a first joint and a second joint. A first connecting bar is set on the reinforcing cage of the first joint, and a second connecting bar is set on the reinforcing cage of the second joint. A C-shaped interface is welded to the end of the first connecting bar, with the C-shaped opening facing the second connecting bar. A locking head is welded to the end of the second connecting bar. The C-shaped interface is fitted onto the outside of the second connecting bar to form a tight anti-tension structure. Both are lowered and concrete is poured, so that both are embedded and fixed in the interlocking pile to form a permanent rigid structure, improving the connection strength of the circular and rectangular interlocking piles and solving the problems of insufficient tensile strength at the connection point of the circular-rectangular interlocking piles and easy cracking of the joint under tension.

Description

Technical Field

[0001] This invention relates to the field of interlocking pile technology, and more specifically, to a large-diameter circular rectangular interlocking pile connection system and construction process. Background Technology

[0002] The joints and types of circular-rectangular interlocking piles are key points in construction, significantly affecting their integrity and deformation resistance. Currently, the joint types used in engineering mainly include interlocking pipe joints, joint boxes, I-beam joints, cross joints, precast concrete joints, H-beam joints, and Type II joints. Analyzing the stress and deformation at the joints, they can be categorized into flexible joints and rigid joints. Among flexible joints, the most typical is the interlocking pipe joint. This type of joint uses less steel, and the interlocking pipe can be reused, resulting in a simple structure that is widely used in practical engineering. Rigid joints offer more reasonable overall stress distribution and, due to their good overall rigidity and small displacement, can reduce the impact on the surrounding environment. Therefore, adopting a high-strength rigid joint structure combined with a reasonable construction process is a technical challenge for circular-rectangular interlocking piles and their joints.

[0003] The existing technology has the following disadvantages: (1) The circular interlocking pile and the rectangular interlocking pile are set separately and then connected by a connector, which destroys the overall structural strength; (2) The tensile strength of the connector is insufficient and it does not form an effective force transmission structure; (3) The connector manufacturing process is complicated and cannot be carried out simultaneously with the circular-rectangular mixed pile. Summary of the Invention

[0004] To address the aforementioned deficiencies or improvement needs of existing technologies, this invention provides a large-diameter circular-rectangular interlocking pile connection system and construction process. The system includes circular interlocking piles, rectangular interlocking piles, and T-joints. Circular and rectangular interlocking piles alternately form a circular-rectangular interlocking pile. A slot is milled at the connection point for installing the T-joint. The joint includes a first joint and a second joint. A first connecting bar is provided on the reinforcing cage of the first joint, and a second connecting bar is provided on the reinforcing cage of the second joint. A C-shaped interface is welded to the end of the first connecting bar, with the C-shaped opening facing the second connecting bar. A locking head is welded to the end of the second connecting bar. The C-shaped interface, when fitted over the outside of the second connecting bar, forms a secure tensile-resistant structure. Both are lowered and concrete is poured, embedding and fixing them within the interlocking pile to form a permanent rigid structure. This improves the connection strength of the circular and rectangular interlocking piles, solving the problems of insufficient tensile strength at the circular-rectangular interlocking pile connection and the tendency for the joint to crack under tension.

[0005] To achieve the above objectives, according to one aspect of the present invention, a large-diameter circular-rectangular interlocking post connection system is provided, comprising:

[0006] The invention comprises a circular interlocking pile, a rectangular interlocking pile, and a T-joint. The circular interlocking pile is formed by rotary drilling and is alternately fixedly connected with the rectangular interlocking pile. A milling groove is provided at the junction of the two piles. The T-joint is located in the milling groove to fix the circular interlocking pile and the rectangular interlocking pile. The T-joint includes a first joint and a second joint. The first joint is located in the milling groove of the rectangular interlocking pile, and the second joint is located in the milling groove of the circular interlocking pile.

[0007] The first joint is provided with a first connecting rib, and the second joint is provided with a second connecting rib. The first connecting rib and the second connecting rib form an anti-detachment structure, and both are cast and fixed inside the T-shaped joint.

[0008] Furthermore, the first connecting rib includes a C-shaped interface with an opening facing the second connecting rib, and the second connecting rib includes a locking head. The locking head is larger than the opening, and the C-shaped interface is fitted onto the locking head to achieve an anti-detachment function.

[0009] Furthermore, the first joint includes a first reinforcing rib, and the second joint includes a second reinforcing rib. The first reinforcing rib is pre-embedded and cast in the first joint and fixedly connected to the first connecting rib. The second reinforcing rib is pre-embedded and cast in the second joint and fixedly connected to the second connecting rib.

[0010] Furthermore, the first connecting bar includes an interface fixing bar, one end of which is welded to the first reinforcing bar and the other end of which is welded to the C-shaped interface.

[0011] Furthermore, the second connecting rib includes a connecting section and a locking head fixing rib. The two ends of the connecting section are respectively welded and fixed to the locking head and the locking head fixing rib, and the locking head fixing rib is welded and fixed to the second reinforcing rib.

[0012] Furthermore, the first joint includes a first longitudinal reinforcement, and the second joint includes a second longitudinal reinforcement, with the first longitudinal reinforcement and the second longitudinal reinforcement respectively pre-embedded and cast into the first joint and the second joint.

[0013] Furthermore, the circular interlocking pile includes a first skeleton steel bar, a second skeleton steel bar, a first guide bar, and a connecting groove. The first skeleton steel bar and the first guide bar are welded and fixed on one side. The first skeleton steel bar, the second skeleton steel bar, and the first guide bar are pre-embedded and cast into the circular interlocking pile.

[0014] Furthermore, the rectangular interlocking pile includes a third skeleton steel bar and a second guide bar, the second guide bar and the third skeleton steel bar are fixed by welding on one side, and both are pre-embedded and cast into the rectangular interlocking pile.

[0015] According to another aspect of the present invention, a construction method for improving the connection performance of large-diameter circular rectangular interlocking pile joints is provided, comprising the following steps:

[0016] S100, Site clearing and leveling, positioning the planar coordinates of the circular interlocking piles, rectangular interlocking piles, first joint, and second joint;

[0017] For the construction of S200 large-diameter circular interlocking piles, a rotary drilling reverse circulation process is adopted. After the hole is formed, the circular interlocking pile steel cage is lowered and concrete is poured. The verticality deviation of the pile body is controlled to be less than 1%. The first skeleton steel bar and the first guide bar are welded on one side, and the first skeleton steel bar and the second skeleton steel bar are welded on both sides to form the skeleton.

[0018] For S300, the construction of interlocking piles is carried out by using a trenching machine to form the trench. The verticality deviation of the trench shall not exceed 1 / 400 of the wall height. After the trench is formed, the steel cage is lowered and concrete is poured. The third skeleton steel and the second guide bar are welded on one side.

[0019] S400, T-type joint construction, the first and second joints are both milled by a small milling machine. During the construction process, the first and second joints are shaped by the small milling machine.

[0020] S500, lower the steel cage and connecting bars, lower the steel cage in sections, the first and second connecting bars are pre-welded and fixed to the steel cage of the first and second joints, ensure that the C-shaped interface hugs the locking head when lowering, and then pour concrete to form a stable structure to complete the construction of the T-joint.

[0021] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects:

[0022] 1. This invention provides a large-diameter circular-rectangular interlocking pile connection system, comprising circular interlocking piles, rectangular interlocking piles, and T-joints. Circular and rectangular interlocking piles are alternately connected to form a circular-rectangular interlocking pile. A slot is milled at the connection point for installing the T-joint, which includes a first joint and a second joint, which are vertically fixedly connected. A first connecting bar is provided on the reinforcing cage of the first joint, and a second connecting bar is provided on the reinforcing cage of the second joint. The first and second connecting bars form a circumferential anti-tensile structure. Then, both are lowered and concrete is poured, embedding and fixing them within the circular-rectangular interlocking pile to form a permanent rigid structure. This improves the connection strength of the circular and rectangular interlocking piles and solves the problem of insufficient tensile strength at the connection point of the circular-rectangular interlocking pile.

[0023] 2. This invention provides a large-diameter circular-rectangular interlocking pile connection system. The T-type joint used includes a first joint and a second joint. A first connecting bar and a second connecting bar are welded and fixed to the first joint and the second joint, respectively. A C-shaped interface is welded to the end of the first connecting bar, with the C-shaped opening facing the second connecting bar. A locking head is welded to the end of the second connecting bar. After the C-shaped interface is fitted over the outside of the second connecting bar, a tight anti-tension structure is formed. A first reinforcing bar and a second reinforcing bar are also provided on the steel cage of the first joint and the second joint, respectively. The first connecting bar is welded and fixed to the first reinforcing bar, and the second connecting bar is welded and fixed to the second reinforcing bar. Both are used to transmit the tensile force from the C-shaped interface and the locking head, respectively. After the steel cage of the first joint and the second joint is lowered and poured, the first reinforcing bar, the second reinforcing bar, the first connecting bar and the second connecting bar solidify into a whole with the concrete, which enhances the strength of the T-type joint itself and solves the problem that the connection joint used in circular-rectangular interlocking piles is prone to tensile cracking.

[0024] 3. This invention provides a construction process for a large-diameter circular-rectangular interlocking pile connection system. The process involves first pouring the circular and rectangular interlocking piles, then milling a T-shaped groove at the connection point using a milling machine. The first and second connecting bars are pre-welded to the reinforcing cage before the T-shaped reinforcing cage is lowered. Finally, the T-shaped groove concrete is poured, thus completing the joint fabrication. This integrated molding process shortens the construction time. The reinforcing steel structure of the T-shaped joint can be prepared simultaneously during the milling process, improving construction efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a large-diameter circular-rectangular interlocking pile connection system according to an embodiment of the present invention. Figure 1 ;

[0026] Figure 2 This is a top view of a large-diameter circular-rectangular interlocking pile connection system according to an embodiment of the present invention;

[0027] Figure 3 This is a T-shaped structural cross-sectional view of a large-diameter circular-rectangular interlocking pile connection system according to an embodiment of the present invention;

[0028] Figure 4 This is a partially enlarged view A of a large-diameter circular-rectangular interlocking pile connection system according to an embodiment of the present invention;

[0029] Figure 5 This is a diagram showing the reinforcement arrangement of the circular interlocking piles in a large-diameter circular rectangular interlocking pile connection system according to an embodiment of the present invention;

[0030] Figure 6 This is a diagram showing the reinforcement arrangement of the rectangular interlocking piles in a large-diameter circular-rectangular interlocking pile connection system according to an embodiment of the present invention;

[0031] Figure 7This is a construction flowchart of a large-diameter circular rectangular interlocking pile connection system according to an embodiment of the present invention.

[0032] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-circular interlocking pile, 2-rectangular interlocking pile, 3-first joint, 4-second joint, 5-first connecting bar, 6-second connecting bar, 11-first skeleton bar, 12-second skeleton bar, 13-first guide bar, 14-connecting groove, 21-third skeleton bar, 22-second guide bar, 31-first longitudinal bar, 32-first reinforcing bar, 41-second longitudinal bar, 42-second reinforcing bar, 51-interface fixing bar, 52-C-shaped interface, 61-locking head, 62-connecting section, 63-locking head fixing bar. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0034] like Figures 1-7 As shown, the present invention provides a large-diameter circular-rectangular interlocking pile connection system, including a circular interlocking pile 1, a rectangular interlocking pile 2, and a T-joint. The circular interlocking pile 1 is a large-diameter pile foundation, which is formed by rotary drilling. The rectangular interlocking pile 2 has a smaller diameter and is formed by milling. The circular interlocking pile 1 and the rectangular interlocking pile 2 are alternately connected. The T-joint is located between the two and serves as a fixed connection. The T-joint includes a first joint 3, a second joint 4, a first connecting bar, and a second connecting bar. One end of the first joint 3 is fixedly connected to the rectangular interlocking pile 2, and the other end extends into the circular interlocking pile 1 and connects to the second joint 4. Preferably, the first joint 3 and the second joint 4 are perpendicular to each other. The first connecting bar is fixed to the end 3 of the first joint, and the second connecting bar is fixed to the end of the second joint 4. The first connecting bar and the second connecting bar are rigidly connected to ensure the coordinated stress performance of the circular-rectangular interlocking pile.

[0035] Furthermore, such as Figures 1-6As shown, both the first joint 3 and the second joint 4 are formed by milling grooves in the circular interlocking pile 1 using a milling machine. The first connecting bar and the second connecting bar are the connecting structural bars of the first joint 3 and the second joint 4, respectively. The first joint 3 includes a first longitudinal bar 31 and a first reinforcing bar 32, both of which are lowered together with the reinforcing cage of the first joint 3. The first longitudinal bar 31 is arranged longitudinally, and the first reinforcing bar 32 is arranged laterally. The reinforcing bar is perpendicular to the first connecting bar. Further, the first connecting bar includes an interface fixing bar 51 and a C-shaped interface 52. The interface fixing bar 51 is welded and fixed to the first reinforcing bar 32. The C-shaped interface 52 is welded and fixed to the end of the interface fixing bar 51. The C-shaped interface 52 is a laterally open, circumferential shape. Preferably, it can be a C-shaped shape, and the opening faces the second joint 4. The C-shaped interface is used to form a stable connection with the second connecting bar. Further, the second connecting bar includes a locking head 61, a connecting section 62, and a locking head fixing bar 63. The reinforcing bar 63 is welded and fixed to the second joint 4, facing the first connecting bar. A connecting section 62 is welded and fixed to its end. The connecting section 62 is used to fix the locking head 61. Since the locking head 61 is located in the C-shaped interface 52, the diameter of the connecting section 62 is smaller than the opening size of the interface. By passing through the opening, the connecting section 62 extends into the C-shaped interface 52, so that the interface surrounds the locking head 61. Preferably, the locking head 61 is welded and fixed to the connecting section 62, protruding in a cap shape, ensuring that its diameter is larger than the opening, preventing the locking head 61 from coming out of the C-shaped interface 52. After the first joint 3 and the second joint 4 are completed, it becomes a permanent structure. When the two joints are subjected to the mutual separation tension, the C-shaped interface 52 locks the locking head 61. The interface fixing reinforcing bar 51 transmits the tension to the second reinforcing bar 32. The connecting section 62 and the locking head fixing reinforcing bar 63 transmit the tension to the second joint 4, forming a stable tensile structure and enhancing the structural strength of the T-joint as a connecting fixing head. Furthermore, the second joint 4 includes a second longitudinal bar 41 and a second reinforcing bar 42, both of which are lowered together with the steel cage of the second joint 4. The second longitudinal bar 41 is arranged longitudinally, and the second reinforcing bar 42 is arranged transversely. The reinforcing bar is perpendicular to the second connecting bar. The locking head fixing bar 63 is welded and fixed to the second reinforcing bar 42. Since the reinforcing bar is pre-embedded in the second joint 4, when the locking head fixing bar 63 is subjected to tension, the force is effectively transmitted to the second joint 4.

[0036] Furthermore, the rectangular interlocking pile 2 is divided into several trench segments during construction. These segments are then connected to the foundation of the circular interlocking pile 1 via T-joints, thereby forming a shear wall.

[0037] Furthermore, such as Figures 2-6As shown, the circular interlocking pile 1 includes a first skeleton steel bar 11, a second skeleton steel bar 12, a first guide bar 13, and a connecting groove 14. The first skeleton steel bar 11 and the first guide bar 13 are welded on one side, preferably with a weld length of not less than 25 cm. The first skeleton steel bar 11 and the second skeleton steel bar 12 are welded on both sides to form a skeleton, preferably with a weld length of not less than 12.5 cm. The vertical spacing of the horizontal steel bar skeleton is 300 cm. If the first guide bar 13 conflicts with the sonic logging pipe used to detect the integrity of the pouring during construction, its position can be adjusted appropriately. The connecting groove 14 is an installation groove milled by a milling machine for the lowering and pouring of the rectangular interlocking pile 2 steel cage. Further, the rectangular interlocking pile 2 includes a third skeleton steel bar 21 and a second guide bar 22. The second guide bar 22 and the third skeleton steel bar 21 are fixed by a single-sided weld, preferably with a weld length of not less than 12.5 cm. If the second guide bar 22 conflicts with the sonic logging pipe, its position can be adjusted appropriately.

[0038] like Figures 1-7 As shown, according to another aspect of the present invention, the present invention provides a construction method for a large-diameter circular-rectangular interlocking pile connection system, specifically including:

[0039] S100, Site clearing and leveling;

[0040] Specifically, accurately locate the planar coordinates of the circular interlocking pile 1, the rectangular interlocking pile 2, the first joint 3, and the second joint 4;

[0041] S200, construction of large-diameter circular interlocking piles;

[0042] Specifically, a rotary drilling reverse circulation process is adopted. After the hole is formed, the steel cage of the circular interlocking pile 1 is lowered and C30 concrete is poured. The verticality deviation of the pile body is strictly controlled to be less than 1%. The first skeleton steel bar 11 and the first guide bar 13 are single-sided welded with a weld length of not less than 25cm. The vertical spacing of the horizontal steel bar skeleton is 300cm. The first skeleton steel bar 11 and the second skeleton steel bar 12 are double-sided welded to form a skeleton with a weld length of not less than 12.5cm. If the steel bar conflicts with the sonic logging pipe during construction, its position can be adjusted appropriately.

[0043] S300, construction of interlocking piles;

[0044] Specifically, a milling machine is used to form the trench, and the vertical deviation of the trench shall not exceed 1 / 400 of the wall height. After the trench is formed, the steel cage is lowered and concrete is poured. The third skeleton steel bar 21 and the second guide bar 23 are single-sided welded, and the weld length is not less than 25 cm. The vertical spacing of the horizontal steel bar skeleton is 300 cm, and the length of the skeleton weld is not less than 12.5 cm. If the steel bar conflicts with the sonic logging pipe during construction, its position can be adjusted appropriately.

[0045] S400, T-type joint construction;

[0046] Specifically, the first joint 3 and the second joint 4 are both formed by milling grooves using a small milling machine. During the construction process, the first joint 3 and the second joint 4 are formed by milling grooves using a small milling machine.

[0047] S500, lower the steel cage and connecting bars;

[0048] Specifically, the steel cage is lowered in sections. The first and second connecting bars are pre-welded and fixed to the steel cage of the first joint 3 and the second joint 4. During the lowering, the C-shaped interface 52 is ensured to surround the locking head 61. Then, concrete is poured to form a stable structure, thus completing the construction of the T-joint.

[0049] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A large diameter circular rectangular interlocking pile connection system, characterized in that, include: The circular interlocking pile (1), the rectangular interlocking pile (2), and the T-joint are constructed by rotary drilling and are alternately fixedly connected with the rectangular interlocking pile (2). A milling groove is set at the junction of the two. The T-joint is set in the milling groove to fix the circular interlocking pile (1) and the rectangular interlocking pile (2). The T-joint includes a first joint (3) and a second joint (4). The first joint (3) is set in the milling groove of the rectangular interlocking pile (2), and the second joint (4) is set in the milling groove of the circular interlocking pile (1). The first joint (3) is provided with a first connecting rib, and the second joint (4) is provided with a second connecting rib. The first connecting rib and the second connecting rib form an anti-detachment structure, and both are cast and fixed inside the T-shaped joint. The first connecting rib includes a C-shaped interface (52) with an opening facing the second connecting rib. The second connecting rib includes a locking head (61). The locking head (61) is larger than the opening. The C-shaped interface (52) is sleeved on the locking head (61) to achieve the anti-detachment function. The first joint (3) includes a first reinforcing rib (32), and the second joint (4) includes a second reinforcing rib (42). The first reinforcing rib (32) is pre-embedded and cast in the first joint (3) and fixedly connected to the first connecting rib. The second reinforcing rib (42) is pre-embedded and cast in the second joint (4) and fixedly connected to the second connecting rib.

2. A large diameter round and rectangular engaged pile connection system according to claim 1, characterized in that, The first connecting bar includes an interface fixing bar (51), one end of which is welded to the first reinforcing bar (32) and the other end is welded to the C-shaped interface (52).

3. A large diameter round and rectangular engaged pile connection system according to claim 1, characterized in that, The second connecting bar includes a connecting section (62) and a locking head fixing bar (63). The two ends of the connecting section (62) are welded and fixed to the locking head (61) and the locking head fixing bar (63) respectively. The locking head fixing bar (63) is welded and fixed to the second reinforcing bar (42).

4. A large diameter round cornered pile connection system according to any one of claims 1-3, characterized in that, The first joint (3) includes a first longitudinal bar (31), and the second joint (4) includes a second longitudinal bar (41). The first longitudinal bar (31) and the second longitudinal bar (41) are respectively pre-embedded and cast in the first joint (3) and the second joint (4).

5. A large diameter round and rectangular pile connection system according to any one of claims 1-3, characterized in that, The circular interlocking pile (1) includes a first skeleton steel bar (11), a second skeleton steel bar (12), a first guide bar (13) and a connecting groove (14). The first skeleton steel bar (11) and the first guide bar (13) are welded and fixed on one side. The first skeleton steel bar (11), the second skeleton steel bar (12) and the first guide bar (13) are pre-embedded and cast in the circular interlocking pile (1).

6. A large diameter round and rectangular pile connection system according to any one of claims 1-3, characterized in that, The rectangular interlocking pile (2) includes a third skeleton steel bar (21) and a second guide bar (22). The second guide bar (22) and the third skeleton steel bar (21) are fixed by welding on one side and are pre-embedded and cast in the rectangular interlocking pile (2).

7. A construction method for a large-diameter circular-rectangular interlocking pile connection system as described in any one of claims 1-6, characterized in that, Includes the following steps: S100, Site clearing and leveling, positioning the planar coordinates of the circular interlocking piles, rectangular interlocking piles, first joint, and second joint; For the construction of S200 large-diameter circular interlocking piles, a rotary drilling reverse circulation process is adopted. After the hole is formed, the circular interlocking pile steel cage is lowered and concrete is poured. The verticality deviation of the pile body is controlled to be less than 1%. The first skeleton steel bar and the first guide bar are welded on one side, and the first skeleton steel bar and the second skeleton steel bar are welded on both sides to form the skeleton. For S300, the construction of interlocking piles is carried out by using a trenching machine to form the trench. The verticality deviation of the trench shall not exceed 1 / 400 of the wall height. After the trench is formed, the steel cage is lowered and concrete is poured. The third skeleton steel and the second guide bar are welded on one side. S400, T-type joint construction, the first and second joints are both milled by a small milling machine. During the construction process, the first and second joints are shaped by the small milling machine. S500, lower the steel cage and connecting bars, lower the steel cage in sections, the first and second connecting bars are pre-welded and fixed to the steel cage of the first and second joints, ensure that the C-shaped interface hugs the locking head when lowering, and then pour concrete to form a stable structure to complete the construction of the T-joint.

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